Electric roaster



April 25, 1939.

B. F. FARR ELECTRIC ROASTER Filed NOV. 20, 1956 22 INVENTOR .BQWara F/ arK ATTbRNEY Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE Westinghouse Electrics; Manufacturing Company, East PittSburgh Paa a corporation of Pennsylvania Application November 20, 1936, Serial No. 111,798

1 Claim.

My invention relates to electric masters and more particularly to anchoring the heating coils to the wall of the roaster cooking well.

It is an object of my invention to provide means whereby the heating coil wound around the cooking well of a roaster may be rigidly and securely fastened to the side of such cooking well.

A further object of my invention is to provide means whereby the fastening or anchoring device may be attached to the insulating material in such a manner as not to tear or rupture the insulating material with the application of tension upon said anchoring means.

A further object of my invention is to provide means for insulating the fastening or anchoring devices from the cooking well.

Other objects of my invention will either be pointed out specifically in the course of the following description embodying my invention, or will be apparent from such description.

In the accompanying single sheet of drawings:

Figure 1 is a partial sectional view of a roaster showing one form of an anchoring device,

Fig. 2 is a side elevational view of a cooking well showing the heating coil and a side anchoring device placed thereon,

Fig. 3 is a partial sectional view of a cookin well,

Fig. 4 is a plan view of one form of an anchoring device,

Fig. 5 is a sectional view of the anchoring device shown in Fig. 4, I

Fig. 6 is an elevational view of another form of an anchoring device, and

Fig. 7 is an elevational view of the anchoring device shown in Fig. 6 with a sectional view of an additional means for rigidly attaching it to the insulating material.

Referring to Fig. 1 of the drawing, I show a roaster I, having an outer wall 6 and a cooking well 2. Wrapped around the cooking well 2 is a sheet of insulating material 3, preferably asbestos. An electric resistance wire heater 4 is wound about the cooking well 2 over the sheet of insulating material 3 and anchored thereto by, my preferred anchoring device 5.

Fig. 2 shows the cooking well 2 with the electric heater 4 and a side anchoring device 5. The sheet of insulating material 3 has been wrapped around the well 2 and is overlapped in any suit able manner so as to produce a continuous insulation about the side of the cooking well 2 with a small overlapping section having a double layer. The solid line 8 illustrates the outer end of the sheet of insulating material 3 and dotted line 1 illustrates the inner end thereof. This overlapping of the insulation material 3 provides insulation for the base of the anchoring device 5, as will be explained hereinafter.

Fig. 3 shows the general shape of the walls of well 2 and the spaced relationship of the well 2, the sheet insulation 3, the heating coil 4 and any desirable insulating material It which may be placed thereon. It is to be understood that the general shape of the cooking well is not claimed in this application and that any shape of a cooking well may be used.

Fig. 4 illustrates a preferred form of an anchoring device 5. The anchoring device 5 is composed of two major sections, an eyelet section l4b which may have any general shape desired and a J section Ma offset therefrom. This J section l4a is offset from the eyelet section Mb a sufflcient distance to enable the resistance heating wire 4 to be wound and anchored about the foot portion of the J section I4a.

Fig. 5 illustrates the spaced relationship between the cooking well 2, the anchoring device 5 and the manner of attaching said device to the sheet insulating material 3. The insulating material l3 may either be the under portion of the overlapping end of the sheet insulating material 3, as shown by reference characters 1 and 8 in Fig. 2, or it may represent an extra strip of such material inserted between the cooking well 2 and the insulating material 3.

To construct or assemble an anchoring device similar to that shown in Figs. 4 and 5, a rivet, grommet, eyelet or any other suitable anchoring medium l5 may be inserted through a large washer H, the sheet insulating material 3, a washer l8 and the eye of the eyelet section 14b of the anchoring device 5. The anchoring medium 15 may then be spun over upon the anchoring device 5 to secure such device rigidly to the sheet insulating material 3. The base I 6 of the anchoring medium I5 is insulated from the cooking well 2 by the insulating material IS. A large washer ll of any desirable material is inserted between the insulating material 3 and the base It of the eyelet 15 to prevent the base l6 from tearing or rupturing the insulating material 3 upon the application of tension to the resistance heating wire 4, which has been wound around and anchored to the anchoring device 5. A washer 18 of any desirable material and size is placed between the insulating material 3 and the anchoring device 5 to enable a more rigid connection between the anchoring device 5 and the insulating material 3.

Fig. 6 illustrates another form 2i of an anchoring device. This anchoring device 2| may be either an eyelet or grommet; and has a base 22. This grommet 2| is inserted through the insulating material 3 in any suitable manner. A large washer l'l substantially larger than the base 22 of the grommet 2| is inserted between such base and the sheet insulating material 3 to pre vent the base 22 from tearing or rupturing the said insulating material 3 upon the application of tension to the resistance heating wire 4, which is anchored to such grommet 2|. The top of the grommet 2| may be spun over to form a lip 24 so as to prevent the heating element 4 from slipping or being accidentally knocked off said grommet 2|.

Fig. 7 illustrates an anchoring device 2| similar to that shown in Fig. 6, with an additional device'23 for rigidly attaching the grommet or eyelet 2| to the sheet insulating material 3. This additional anchoring device 23 may be either an eyelet, grommet or any other device of similar structure. This eyelet 23 is placed over grommet 2| which has been attached to the insulating material 3 in any suitable manner such as was described above and upon the outer surface of the insulating material 3. The upper. or extending end of grommet 2| may then be spun over and upon the upper end of eyelet 23 in such a manner as to rigidly attach said grommet 2|, washer I1 and eyelet 23 to the sheet insulating material 3. As the upper end of grommet 2| is being. spun down upon the eyelet 23, aportion of it will form a lip 24 which will extend beyond the eyelet 23 and prevent the resistance heating wire 4 wound about said eyelet 23 from being accidentally slipped oil" said eyelet and grommet.

As described herebefore, a strip of insulating material l3 may be inserted between the base 22 of the grommet 2| and the cooking well 2 in such a manner as to insulate the base 22 from said cooking well. This strip l3 may be either an additional strip inserted under the sheet insulat ing material 3 or may be the under portion of the overlapping end section.

It is obvious, therefore, that I have illustrated various methods of attaching and anchoring a heating element to the insulating material, wrapped about a cooking well of a roaster, so that the attaching device will be insulated from said cooking well and not rupture or tear the insulating material. However, I wish it to be understood that various other modifications may be made in the device embodying my invention without departing from the spirit and scope thereof, and I desire that only such limitations shall be placed thereon as are imposed by the prior art and the appended claim.

I claim as my invention:

A cooking appliance comprising a cooking well, an electric resistance wire heater therefor, a sheet of insulating material wound about said well for insulating the heater therefrom, anchoring devices for attaching the electric resistance wire heater to the insulating sheet, each anchoring device being substantially flat and disposed substantially parallel to the adjacent portion of the insulating sheet and comprising an eyelet portion and a portion of J-shape, and means for securing each anchoring device to the insulating sheet comprising a rivet-like element having a shank extending through the insulating sheet and the eyelet portion and having head portions between which the insulating sheet and the eyelet portion are riveted or gripped, the electric resistance wire heater being wound about the well over the insulating sheet and tied to the J-shaped portions of the anchoring devices, the J-shaped portions being spaced from the insulating sheet sufiiciently to permit the resistance wire heater to be wound on the J-shaped portions.

BERNARD F. FARR. 

